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| Spatiotemporal Variations and Contributing Factors of Air Pollutant Concentrations in Malaysia during Movement Control Order due to Pandemic COVID-19 | |
| Ash'aari, Zulfa Hanan1; Aris, Ahmad Zaharin1; Kamal, Nurfatin Izzati Ahmad1; Saifuddin, Muhamad Firdaus Umar1; Ezani, Eliani1; Jaafar, Norlin2; Jahaya, Jasrul Nizam2; Manan, Shamsuri Abdul2 | |
| 2020-10 | |
| 发表期刊 | AEROSOL AND AIR QUALITY RESEARCH
 |
| ISSN | 1680-8584 |
| EISSN | 2071-1409 |
| 摘要 | The restriction of daily and economic-related activities due to COVID-19 pandemic via lockdown order has been reported to improve air quality. This study evaluated temporal and spatial variations of four major air pollutant concentrations across Malaysia before (March 4, 2020-March 17, 2020) and during the implementation of different phases of Movement Control Order (MCO) (March 18, 2020-May 12, 2020) from 65 official regulatory air quality stations. Results showed that restriction in daily and economic activities has remarkably reduced the air quality in all sub-urban, urban, and industrial settings with relatively small contributions from meteorological conditions. Overall, compared to before MCO, average concentrations of PM2.5, CO, and NO2 reduced by 23.1%, 21.74%, and 54.0%, respectively, while that of SO2 was constant. The highest reduction of PM2.5, CO, and NO2 were observed in stations located in urban setting, where 63% stations showed significant reduction (p < 0.05) for PM2.5 and CO, while all stations showed significant reduction in NO2 concentrations. It was also revealed that 70.5% stations recorded lower concentrations of PM2.5 during MCO compared to before MCO, despite that high numbers of local hotspots were observed simultaneously from NASA's Moderate Resolution Imaging Spectroradiometer (MODIS). Spatial analysis showed that the northern part of Peninsular had the highest significant reduction of PM2.5, while the highest of NO2 and CO reduction were found in stations located in the central region. All pollutants exhibit similar diurnal trends when compared between pre- and during MCO although significant lower readings were observed during MCO. This study gives confidence to regulatory body; the enforcement of strict air pollution prevention and control policies could help in reducing pollution. |
| 关键词 | Aerosols Anthropogenic emissions Area sources Mobile sources Stationary sources |
| DOI | 10.4209/aaqr.2020.06.0334 |
| WOS关键词 | KLANG VALLEY ; QUALITY ; IMPACT ; PM2.5 ; LOCKDOWN ; AREA |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 出版者 | TAIWAN ASSOC AEROSOL RES-TAAR |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 专题 | 新冠肺炎 循证社会科学证据集成 |
| 作者单位 | 1.Univ Putra Malaysia; 2.Dept Environm |
| 推荐引用方式 GB/T 7714 | Ash'aari, Zulfa Hanan,Aris, Ahmad Zaharin,Kamal, Nurfatin Izzati Ahmad,et al. Spatiotemporal Variations and Contributing Factors of Air Pollutant Concentrations in Malaysia during Movement Control Order due to Pandemic COVID-19[J]. AEROSOL AND AIR QUALITY RESEARCH,2020. |
| APA | Ash'aari, Zulfa Hanan.,Aris, Ahmad Zaharin.,Kamal, Nurfatin Izzati Ahmad.,Saifuddin, Muhamad Firdaus Umar.,Ezani, Eliani.,...&Manan, Shamsuri Abdul.(2020).Spatiotemporal Variations and Contributing Factors of Air Pollutant Concentrations in Malaysia during Movement Control Order due to Pandemic COVID-19.AEROSOL AND AIR QUALITY RESEARCH. |
| MLA | Ash'aari, Zulfa Hanan,et al."Spatiotemporal Variations and Contributing Factors of Air Pollutant Concentrations in Malaysia during Movement Control Order due to Pandemic COVID-19".AEROSOL AND AIR QUALITY RESEARCH (2020). |
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| Ash'aari-2020-Spatio（1522KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
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